// $Id = LocalFile.js,v 1.12 2010-01-02 09 =45 =14 gaudenz Exp $
// Copyright (c) 2006-2014, JGraph Ltd
/**
 * Constructs a new point for the optional x and y coordinates. If no
 * coordinates are given, then the default values for <x> and <y> are used.
 * @constructor
 * @class Implements a basic 2D point. Known subclassers = {@link mxRectangle}.
 * @param {number} x X-coordinate of the point.
 * @param {number} y Y-coordinate of the point.
 */
LocalFile = function (ui, data, title, temp, fileHandle, desc) {
    DrawioFile.call(this, ui, data);

    this.title = title;
    this.mode = (temp) ? null : App.MODE_DEVICE;
    this.fileHandle = fileHandle;
    this.desc = desc;
};

//Extends mxEventSource
mxUtils.extend(LocalFile, DrawioFile);

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.isAutosave = function () {
    return this.fileHandle != null && !this.invalidFileHandle && DrawioFile.prototype.isAutosave.apply(this, arguments);
};

/**
 * Specifies if the autosave checkbox should be shown in the document
 * properties dialog. Default is false.
 */
LocalFile.prototype.isAutosaveOptional = function () {
    return this.fileHandle != null;
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.getMode = function () {
    return this.mode;
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.getTitle = function () {
    return this.title;
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.isRenamable = function () {
    return true;
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.save = function (revision, success, error) {
    this.saveAs(this.title, success, error);
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.saveAs = function (title, success, error) {
    this.saveFile(title, false, success, error);
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.saveAs = function (title, success, error) {
    this.saveFile(title, false, success, error);
};

/**
 * Adds all listeners.
 */
LocalFile.prototype.getDescriptor = function () {
    return this.desc;
};

/**
 * Updates the descriptor of this file with the one from the given file.
 */
LocalFile.prototype.setDescriptor = function (desc) {
    this.desc = desc;
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.getLatestVersion = function (success, error) {
    if (this.fileHandle == null) {
        success(null);
    } else {
        this.ui.loadFileSystemEntry(this.fileHandle, success, error);
    }
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.saveFile = function (title, revision, success, error, useCurrentData) {
    if (title != this.title) {
        this.fileHandle = null;
        this.desc = null;
    }

    this.title = title;

    // Updates data after changing file name
    if (!useCurrentData) {
        this.updateFileData();
    }

    var binary = this.ui.useCanvasForExport && /(\.png)$/i.test(this.getTitle());
    this.setShadowModified(false);
    var savedData = this.getData();

    var done = mxUtils.bind(this, function () {
        this.setModified(this.getShadowModified());
        this.contentChanged();

        if (success != null) {
            success();
        }
    });

    var doSave = mxUtils.bind(this, function (data) {
        if (this.fileHandle != null) {
            // Sets shadow modified state during save
            if (!this.savingFile) {
                this.savingFileTime = new Date();
                this.savingFile = true;

                var errorWrapper = mxUtils.bind(this, function (e) {
                    this.savingFile = false;

                    if (error != null) {
                        // Wraps error object to offer save status option
                        error({error: e});
                    }
                });

                this.fileHandle.createWritable().then(mxUtils.bind(this, function (writable) {
                    this.fileHandle.getFile().then(mxUtils.bind(this, function (newDesc) {
                        this.invalidFileHandle = null;

                        if (this.desc.lastModified == newDesc.lastModified) {
                            writable.write((binary) ? this.ui.base64ToBlob(data, 'image/png') : data).then(mxUtils.bind(this, function () {
                                writable.close().then(mxUtils.bind(this, function () {
                                    this.fileHandle.getFile().then(mxUtils.bind(this, function (desc) {
                                        var lastDesc = this.desc;
                                        this.savingFile = false;
                                        this.desc = desc;
                                        this.fileSaved(savedData, lastDesc, done, errorWrapper);
                                    }), errorWrapper);
                                }), errorWrapper);
                            }), errorWrapper);
                        } else {
                            this.inConflictState = true;
                            errorWrapper();
                        }
                    }), mxUtils.bind(this, function (e) {
                        this.invalidFileHandle = true;
                        errorWrapper(e);
                    }));
                }), errorWrapper);
            }
        } else {
            if (this.ui.isOfflineApp() || this.ui.isLocalFileSave()) {
                this.ui.doSaveLocalFile(data, title, (binary) ?
                    'image/png' : 'text/xml', binary);
            } else {
                if (data.length < MAX_REQUEST_SIZE) {
                    var dot = title.lastIndexOf('.');
                    var format = (dot > 0) ? title.substring(dot + 1) : 'xml';

                    // Do not update modified flag
                    new mxXmlRequest(SAVE_URL, 'format=' + format +
                        '&xml=' + encodeURIComponent(data) +
                        '&filename=' + encodeURIComponent(title) +
                        ((binary) ? '&binary=1' : '')).simulate(document, '_blank');
                } else {
                    this.ui.handleError({message: mxResources.get('drawingTooLarge')}, mxResources.get('error'), mxUtils.bind(this, function () {
                        mxUtils.popup(data);
                    }));
                }
            }

            done();
        }
    });

    if (binary) {
        var p = this.ui.getPngFileProperties(this.ui.fileNode);

        this.ui.getEmbeddedPng(mxUtils.bind(this, function (imageData) {
            doSave(imageData);
        }), error, (this.ui.getCurrentFile() != this) ?
            savedData : null, p.scale, p.border);
    } else {
        doSave(savedData);
    }
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
LocalFile.prototype.rename = function (title, success, error) {
    this.title = title;
    this.descriptorChanged();

    if (success != null) {
        success();
    }
};

/**
 * Returns the location as a new object.
 * @type mx.Point
 */
LocalFile.prototype.open = function () {
    this.ui.setFileData(this.getData());
    this.installListeners();
};
